How to Use Master Calibration Blocks aka Gage Blocks 

We had one in work, but it disappeared over a weekend

OMG! It totally is!

Have you check out Joe Pie's digital indicator hang in his shop over @ Advance Innovations ? Both are too cool (@@).

thank you

YEah it's really nice if you don't have sizes like 1.3645 +/- 0.0237 annymore :P

SAE FOREVER❤ 0.03937" looks WAAAY better than 1mm

fractions and decimals too hard for your little brain?

@@s0nnyburnett not at all... I'm a journeyman toolmaker. I can and have worked in both. Why would I want to have to worry about 4 or 5 decimal places back when it only takes 2 or 3 for Metric? Trust me I like SAE. But in a machine shop metric is easier plain and simple. There is no debating this lol.

I was thinking the exact same thing lol

Nobody at my manufacturer uses this much care unless it's a real critical measurement. Only need to mindful when 1 tenths can make or break what you need to know.

What i personally do is store them in the original container (and follow the instructions given by manufacturer for storage) and for use, i do the following steps: 1. wipe them off completely, usually with a chemical that doesnt affect the metal, i tend to use a version of ethanol called t-röd. 2. I lightly touch the mating surfaces with my palms (to get the right amount of oil, you hands should feel dry but well hydrated) as the original inventor did before wringing them together in a circular motion 3. After i am done using them, i wring them apart (to avoid damaging the surfaces and since the method of using palm oil averages 120-150 kg, making pulling them apart a joke) and store them back in the original container according to the instructions from the manufacturer. Mine are the original gauge blocks produced by johansson and so, do not require anything beyond desiccant packs in the box and a good wiping after use but yours may be different.

Part of the 'wringing' phenomenon is a oiled surface attraction in addition to molecular forces and atmospheric pressure.

@@JayKayKay7 it has been tested, wringing occurs in a complete vacuum (as in, it was tested on a space walk on the ISS) and without oil The vacuum has negligible effect but the oil shows a huge difference, such that a lab was needed to insure that there was no microscoping amount of oil left that could explain it. With an ethanol-cleaned set and no added oil, i get maybe 300 grams of force keeping my johansson blocks together while with the oil from my hands, the scale i used was maxed out at 100 kg.

Anti rust oil

Yes Mitutoyo USA uses WD40 on an ink pad for gauge block wringing.

Ya, that was confusing. Went with Gage since that’s what is on Mitutoyo’s website🤔

@@TITANSofCNC a gauge block is a gauge block

www.mitutoyo.co.jp/eng/index.html says gauge.

www.mitutoyo.com/wp-content/uploads/2016/09/E-section-Gage-Blocks.pdf

@@TITANSofCNC it is odd, that Mitutoyo themselves spell it two different ways, maybe just a language/culture difference between USA and rest of world, since they have a similar catalog with the gauge spelling. Would be interesting to hear Mitutoyo's reasoning for the different spelling. www.mitutoyo.co.jp/eng/support/service/catalog/09/E12014.pdf